well i have somekind of problem my hp keeps going down and then i die i don't know what to do it really hard . when i"m in building or in oblivion its no problem but ones i get onto the worldmap it start again can somebody pleaseeeeeeeee help me ?

I think you have been infected with vampirism, that would explain when you go outside you start to lose HP. that is in the daytime right ?

if it is then check your active effects page and see if vampirism is on there.

what can i do to get rid of it?

One thread on the topic, please: http://www.gamesas.com/bgsforums/index.php?showtopic=1069932